I am trying to route calls over a "hairpinned" T1 on a 2811 router between two MFT-1T1 ports. Works great with PRIs, but I can't get a CAS E&M trunk to work. I know that analog E&M can be tested this way by using a rollover cable with the type that is symmetrical.
I have used "debug vpm all", and the destination side sees a seizure, but I don't see it "wink". The calling side has a 550msec timer, and times out waiting for the wink, so no digits get passed. I am using H.323 with CallManager, and IOS 12.4(15)T1.
Should this work, or am I missing something?